The Swiss team is the first to publicly confirm that their car has completed all of the compulsory crash tests.
"The C32 chassis and safety structures have passed their FIA safety tests," Sauber posted on their official Twitter feed.
"So, fully homologated and ready for winter testing (5. Feb)".
With fairly stable regulations, the C32 will be an evolution of the C31 which Sergio Perez and Kamui Kobayashi piloted to four podiums in 2012.
For 2013, Sauber will have a fresh driver line-up, with Nico Hulkenberg joining from Force India and Esteban Gutierrez stepping up from GP2.